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Posted to commits@cassandra.apache.org by "Caleb Rackliffe (Jira)" <ji...@apache.org> on 2020/09/22 20:24:00 UTC
[jira] [Comment Edited] (CASSANDRA-15164) Overflowed Partition Cell
Histograms Can Prevent Compactions from Executing
[ https://issues.apache.org/jira/browse/CASSANDRA-15164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17200343#comment-17200343 ]
Caleb Rackliffe edited comment on CASSANDRA-15164 at 9/22/20, 8:23 PM:
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[~blerer] [~clohfink] I've reworked the patch a bit to handle both of the stats histograms and take into account the feedback [here|https://github.com/apache/cassandra/pull/750#pullrequestreview-493580468]. Short of dynamically growing the number of buckets, this seems like the most reasonable quick fix to make the things that might depend on an overflowed histogram safe. (The worst case is that our estimates won't be as helpful as they would if we had more buckets, etc.)
Tests in progress [here|https://app.circleci.com/pipelines/github/maedhroz/cassandra?branch=CASSANDRA-15164]...
was (Author: maedhroz):
[~blerer] [~clohfink] I've reworked the patch a bit to handle both of the stats histograms and take into account the feedback [here|https://github.com/apache/cassandra/pull/750#pullrequestreview-493580468]. Short of dynamically growing the number of buckets, this seems like the most reasonable quick fix to make the things that might depend on an overflowed histogram safe. (The worst case is that our estimates won't be as helpful as they would if we had more buckets, etc.)
> Overflowed Partition Cell Histograms Can Prevent Compactions from Executing
> ---------------------------------------------------------------------------
>
> Key: CASSANDRA-15164
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15164
> Project: Cassandra
> Issue Type: Bug
> Components: CQL/Interpreter
> Reporter: Ankur Jha
> Assignee: Caleb Rackliffe
> Priority: Urgent
> Labels: compaction, partition
> Fix For: 4.0-beta
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> Hi, we are running 6 node Cassandra cluster in production with 3 seed node but from last night one of our seed nodes is continuously throwing an error like this;-
> cassandra.protocol.ServerError: <Error from server: code=0000 [Server error] message="java.lang.IllegalStateException: Unable to compute ceiling for max when histogram overflowed">
> For a cluster to be up and running I Drained this node.
> Can somebody help me out with this?
>
> Any help or lead would be appreciated
>
> Note : We are using Cassandra version 3.7
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